Switch.



B. HASKINS.

SWITCH.

APPLICATION FILED MAY 15, 1211.

M. m N, w NW i M 8 m 4% D M {Q n w M m Wm s w a w AM Q r m 1 g w m B. HASKINS.

SWITCH.

APPLICATION rum) MAY 15,1911.

Patented Dec. 8,1914.

4 SHEBTSSHEET 2.

AQWWwww B. HASKINS.

SWITCH.

APPLICATION FILED MAY 15,1911

Patented Dec. 8, 1914.

4 SHEETS-SHEET 3.

illilkr in B. HASKINS.

SWITCH.

APPLICATION FILED MAY 15, 1911.

Patented Dec. 8, 1914.

4 SHEETS'SHBET 4.

\ w ll BMW/Mom @smwawww 64? 4 MXO/Mw UNITED STATES PATENT OFFICE, I

BRADLEY HASKINS,- 0's- IL AUKEE, WISCON 5IN, Assmnon BY, mssnn ASSIGN- MENTS, 'IO ALLIS-CHALMERSMANUFACTURING COMPANY, A. CORPORATION OF DELAWARE.

To-all whom it may concern Be it 'known that I, BRADLEY Has'nms, a citizen o .thl United States, resid ng at Milwaukee: in-the county of Milyi'aukee and State of \Visco'nsin, have invented certain" new and useful Improvements in Switches, of which the following is afull, clear, and V exact, specification; I

My invention relates to electric switches. The primary object of my invention is to improve and simplify certain existing types of oil switches, especially those .in which,

the switch parts proper are removable as a unit-from the oil tank without disturbing the latter or the line terminals within it.

This further my object to provide a novel forin of double throw switch and anew form of contact.

The various novel features of my invention will appear from the description and drawings and will .bepai'ticularly pointed out in the claims. I

,Figure 1 is a section substantially on the line l'1 'ot Fig. 3, the switch being in open position and some otthe parts being broken away on other section lines; Fig.2 is'a section substantially on the line 2 -2 o'f Fig 1, l but with the removable'unit partly raised; Fig.- 3 is a section substantially on the line 3-3 of F ig. l, the switch being in closed position; Fig.4 is a section substantially on the line 44 of Fig. 3, the switch being open; and, Fig. 5-is a section substantially on the line 5-5 of Fig. 2.

The frame 10 may .be arranged for mounting in any desired manner, as on a floor or a switchboard. Itcarries all the parts of the switch. Hanging from the frame 10 is the oil tank 11'. which contains oil iuqvhich all'the live parts of the switch are immersed aiid :in which all making and;

hrcalcingof the circuits takes place. Two lmrs 12 extend longitudinally of the tank near thc'lower corners thereof, these bars being supported by bolts 13 depending from the frame 10. Connecting the two bars 12 are a pluralit of cross-bars '14, one cross.

terminal 16.

ha 1: for each poleoi' the switch; the switch shown is a three-pole switch. Mounted on each cross-bar l4 are'threc porcelain insulators 15. in the top of each of which is embedded the shank of a wedge-shaped switch ably corrugated circumterentially to increase the crecpagc distance between the Specification ot Letters Patent. P t t d '1 e s 1 y Application filed m 15, 1911'. SeriaLNo. 627,203.

The insulators 15 are pr'efcrswrrcn.

switch terminals 16 the ban clered in a suitable opening in' each terminal l aise conductor lead 17. The meagre; ex

tend in a horizontal .pl-ancto' the. two-sides of the tank; where they turn upwardlyarid extend through insulatingbushings l8 lok cated in suitable holes in the frame 16m, .the line conductors '19, being connecte d'to the latter by suitable. c0i1plings-20withi'n the bushings 18. The leads fromsthe outer switch terminalslti on each cross-bar 14 extend from the switch terminals directly oiitward until they reach the plane of the bushings 18, the bushings corresponding tothese outer terminals being-in line with'thc terminals themselves. The. leads from the middle terminals'on the-Several cross-bars- 14 are bent in the plane oftheswitch terminals so that they extend to: three end'b'ushin s-s18, as clearly shown-in- Fig. 5,

Supported on inwardly extending sugs ill from the frame :10 is a removable frame 22 which carries'the switch partsproper. This removable frame comprises twometal end plates 23 connected at" the bottom a 24; of insulating. material. The plate 241's preferably of molded insulating material and has molded in it I-sha'ped metzilpieccis the enlarged ends of which are located above and below the plate 21-. vThese I:

shaped pieces correspond innuniber with Y tl switch terminals 16 and are respectively located directly over -them and have, o[

posed spring contact fin ers 26' attached to their enlarged lower en 5 andsimi'lar' fin gers to their upper ends. When the removable unit is in place, the opposed contact;

fingers 26 on each piece 25 engage;-.the two sides of the corresponding wedge-shaped switch terminals 16, as illustrated in Fig. 1. The lower surface of the plate 24 is provided with crossed ribs 28 to increase the .crecpage distance between adjacent sets of contact lingers 2G. Integral with or attached to the upper surface of the plate 2.4:

sov

is a set of insulatim barriers or partitions contact which 'cociperates with the corre sponding contacts 26 to connect the middle oneto either onto one of such' contacts. The ends of the rod 33 are fixed to theugper endsof cross-heads 34, the lower en of which are fixed to short rods 35. These rods extend through and carry rollers 36 fitting in slots 37 in the respective end plates 23. The end portions of these slots are vertical and parallel, and are connected by inverted V-shapedv portions. Fixed'to the ends of the rods-35 outside of the end plates 23 are upwardly extendingarms 38 carrying at their upper ends stub-shafts-39 between which and stub-shafts 4O fixed" in projections 23 from the lower ends of the end plates 23 are located compression springs 41. These springs, which are provided with telescoping guide members 42, tend to hold the rod 33 and the bridging contacts carried thereby in their upper or open osition, as shown in Figs. 1 and 2.

A s aft 43 is mounted in bearings 44 at the upper ends of the endplates 23, and has loosely m'ounted on it beyond the bearing at each end two links 45 and46, thelower ends of which are pivoted to links'47 and 48 loosely mounted on each rod 35. The links 45 and 47, and 46 and 48, form oppositely disposed toggles connecting "the shaft 43 with the rods Fixed on the shaft 43 near each set-of links 45 and 46 is a collar 49 carrying an arc-shaped member 50 which extends over the links 45 and 46 and nearly engages both of them when the switch is in open position as shown in Fig. 2. It is by means of this arc-shaped member 50 that the switch is operated when the shaft 43 is rotated. The ends of the shaft -13 are connected by tongue and groove couplings 51- to stub shafts 52 and 52 mounted in bearings 53 in'the frame 10, the tongues and grooves of these couplings being vertical to allow the removal of the removable switch unit only when the switch isopen. The

' sha 6.52 is preferably biased to this posi- -tior by a light spring 54. The shaft 52 has I fixed to it acollar 55 carrying the operating handle 56, the latter being pivoted on 'thecollar 55 so that it may be moved into and out of engagement with notches in the lockingplate 57. This locking plate 57 may be mounted on the frame 10 or on a switch' board, the shaft 52 in the latter case extendin through the switch-board or being suitably mechanically connected to ,a similar shaft located on the switch-board and carrying the operating handle 56. The inclosure of the switch is completed by a cover 58.

i \Vhen the switch is in open position, and

terminals 16, the spring contact fingers '26 being deflected sufiiciently to cause firm engagement. When the switch unit is fully in place in the tank, it may be fastened there by any suitable means, as by bolts .59. When the switch is openrthe operating handle 56 is in a central position, indicated in Fig. 2.

Upon moving the handle 56 in eitherdirection, thearc-shaped member 50 is' brought into engagement with either the links 45-01 the links 46, causing the engaged links to rotate with the operating handle 56 and the shafts 52 and-43. Assume that the'handle 56 is turned irLa clockwise direction, indicated in Fig. 3. The clockwise rotation of the links 46 pushes the links 48, and through them the'rods 35, to the left, the springs 41 holding the rollers 36 on the rods 35 against the upper or outer surfaces of the slots 37. The reactions of the various forces .cause the crossheads 34 and the parts carried thereby to swing to the left (or counterclockwise) on a constantly shortening radius .about the stub shafts 40 until the projections 60 on the cross-heads 34 strike the guide faces 61 in the end plates 23. The continued movement of the shaft 43 then superimposes upon such rotation about the stub shafts 40 a clockwise rotation about the rods 35 as an axis, until the arms 38 and the cross-head 34 are a'gainbcought to the vertical position. By this timethe rollers 36 have reached the left hand vertical portions of the slots 37.

The still continued movement of the shaft.

43 now moves the cross-head 34 and the parts attached thereto vertically downward by a motion of pure translation, the two contacts 30 on each bridging member engaging the middle and left contacts 26 respectively of the corresponding poles of the switch and finally reaching the position shown in Fig. 3. The closing movement of the switch is limited by the engagement of a projection 62 from the arc-shaped member 50 with the head of one of the adjusting screws The switchmay be locked in closed POSlt1OI1 by the engagement of a tooth on the operating handle 56 with a suitable notch 64 in the locking plate 57 With theswitchin closed position, theremovable unit cannotbe re: moved because of the inclined pos tions of the tongues and grooves of the couplings 51.

To open the switch the tooth on the operating handle 50 is disengaged from the notch 64. The springs 41 then expand and force the movabie switch parts upward to the open position. the opeuii'ig movement of the. switch parts being the rmcrse of their closing movement. Anv arcs which occur are naively moms: be ause of the quick opening action which obtai and are pre ented from strilo "Y over lrom. one contact to another by the, insulating barriers 29. To close the switch in 1: other direction, the handle 5 lilu'vuil i a counter-clockwise (h'rection from s central or or? posit tl causing tlic-engagement of the member 3",) with the links and e najivablc switch parts to the i r sed {i ion, with the bridging the middle contacts 26 onding right hand conations may be made in the prec 5e errangmient slmwn and described, and wh ch do not a 'olvc a. departure from the s irit and s rqu2 of my invention as set to; th in. the appended claims What I claim as new is:

l, in :1 switch, an oil tank, two bars in said tanl; near the bottom thereof, one or mo e cross-bars connecting the first-named bars, and a plurality o switch terminals mounted on top of said cross-bars and insulated thcretron'i, in. combination with a rein-Mable switch unit comprising a frame removable from and. replaceable in said tanii, fixed contacts carried by said frame located directly above and in engageiui ii 5th the switch terminals when the reme' alile frame is in place in the tank, and n; or mor :novahlc contacts mounted on l coiipcratirig with said fixed 'viuh, the combinat on of an oil -ili\, ii i i, nc therein comprising a plurality i :inrli ne or more cross-bars connect- Slit Eifrnl. named l):!.l"-,-, a plurality of in Vi :Hl'atcfl on said crossbars, switch unwanted n said insulators, and conta ts movable into and out of engag mcnt with said sr it h terminals and 'hcn engaj in tin sitter subjecting said in ,vlilEliQF-S to LHliZDl'PbwlOll only.

3 ln :1 switch. the cmnbiuation of an oil in place in the trial: and the initchfis the si case; "iii such n'mulators uno'e'r aim to cover all such modifications ing directly above and their downwardly projecting parts engaging said switch terminals when the removable switch unit is in place in the tank, and one or more movable contacts coiipcrating with the upwardly proiecring parts of said fixed contacts.

53, in a switch, switch terminals suitably mounted in t fixed position, in combination with a removable switch unit compris ing a plate of insulating material, fixed contacts mounted in said plate and projecting on both sides thereof, the parts of said fixed contacts which project on one side of said plate engaging said switch terminals when the removable switch unit is in place, and one or more movable contacts cooperating with the parts of said fixed cont-acts which project on the other side of said plate, the switch terminal engaging part and the movable contact engaging part of each of said fixed contacts being in alinement with the corresponding switch terminal.

6. In a switch, the combination of a support, switch terminals mounted thereon, a movable plate of insulating material, contacts mounted in said plate and each extend ing through said plate 0,11 opposite sides thereof, said contacts in all positions of said plate being in alinement With said switch terminals and movable into and out of engagement therewith, and movable contact members having portions engageable with said contacts mounted in said plate and movable into and out of engagement therewith in alinement with said switch contacts,

7. In tionary a switch, the combination of stucontacts, a movable support, intermediate contacts projecting from both sides of said movable support, the intermediate contacts on one side of said support engaging said stationary contacts, and movahlc bridging members having contact portions in number than the intermediate contacts and engcgeable with a plurality of but less than all of the intermerjliatc contacts on the other side of said support, and operating means for causing each bridging member to engage a plurality of said intermediate contacts.

In a switch, the combination of a movable supporting plate, conductors mounted in said plate and projecting on both sides thereof, spring fingers mounted on the projecting parts of said conductors on each side of said plate, and contact members a portion of which cooperate with the spring contacts on one side of said plate and another portion of which are movable relatively to the spring-contacts on the other side of said plate.

9. In a switch, the combination of a movable supporting plate, conductors mounted in said plate and projecting on both sides thereof, a pair of opposed spring fingers monnted on each of said conductors on each side of said plate, and wedge-shaped contact members cooperating with and movable relatively to the spring contact fingers on each side of the plate and when in engagement with said spring contact fingers being located between the two fingers of a pair and spreading them apart.

10. In a switch, the combination of an oil tank, two bars in said tank, one or more cross-bars connecting said first-named bars, three switch terminals mounted on each of said cross-bars and insulated therefrom, and a removable switch unit comprising a frame ren'iovable from and replaceable in ;aid tank, contacts carried by said frame, there being one of said contacts for each switch terminal, and a bridging contact for each set of three switch terminals, each of said bridging contacts engaging two of the tirsbnamed contacts and the latter engaging; the corresponding switch terminals when the removable switch unit is in place in the tank and the switch is closed.

11. In a switch, the combination of an oil tank, two bars in said tank, one or more cross-bars connecting said first-named bars, three switch terminals mounted on each of said cross-bars and insulated therci'rinn, and a removable switch unit comprising a, frame rcn'iovable from and replaccal'ile. in said tank, contacts carried by said frame, there being one of said contacts for each swiich terminal, a bridging contact For each set of three switch terminals. each of said bridging contacts engaging two of the first-nam d contacts and the latter engaging the corresponding switch terminals when the rrznor able switch unit is in place in the tank and the switch is closed, and means for moving said bridging contacts into engagenicnl with different pairs of said firstmamed conta t 12. In a switch. one or more rows of switch terminals. there being three terminals in a row, in combination with a razor": able switch unit comprising a rim of on facts for each row of terminals, there i one of said contacts "for each switch ternnnal, and a bridging contact for each row of said tirst-namcd contacts, each bridging contm-t engaging the middle one and one of the end ones of the ci'irrcsljioinling row of tirstnamed contacts and the contacts enejed thereby engaging said switch terminals when the removable switch unit is in and the switch is closed.

13. In a switch, one or more rows of switch terminals, there being three terminals in a row,

tacts for each row of terminals, there being one of said contacts for each switch terminal, a bridging contact for each row of said first named 'contacts, each bridging contact engaging the middle one and one of the end ones of the correspmiding row of first named contacts and the contacts engaged thereby engaging said switch terminals when the removable switch unit is in place and the switch is closed, and means for moving said bridging contacts into engagement with the middle and different end ones of the corresponding rows of first-named con tacts.

t4. in a switch, the (,()Il'll ill:ltl0ll of tor-- minal contacts one or nnre rows of intermediate contacts eciiperating therewith, there being three contaclsin a roma'bridging con tact for each row of said intermediate contacts. and means for moving said bridging contacts so that each bridging contact may engage the middle contact and either end contact of the corresponding row of inter mediate contacts and for causing the engaging and disengaging movement between said bridging contacts and intermediate contacts to he one of snl'islantiallr pure rectilinear translation.

15. In a switch, the combination of terminal contacts one or more rows oi" interme diate contacts cooperating tl'ltF-(EWitil, there icing three contacts in a row, a bridging contact for each row cl said intermediate contacts, and means for moving said bridging contacts may engage the middle contact and either end contact of the corresponding row of intermediate contacts and for cansing the engaging and disengaging movement be tween said bridging conta ts and intermediate c ntacts to be one of substantially pure rectilinear translation while the internediate part of the movement of the bridging contacts includes a movement of rotation.

16, in a switch, tciniinal contacts, a row of three contacts cooperating therewith, a bridging contact which is normally out of line 'ith Said three contacts, and i'neans for naming said bridging contact so that it will engage the middle one and either end one of said row of contacts and for causing the cngz'iging and disengaging part of such movement to be a substantial movement of pure trainilatii'in substantiallyatright angles to the line of such row of contacts.

17. In a switch. terminal contacts, a row of three contacts cooperating therewith, a bridging contact, which is normally out of line with said three contacts, and means for moving said bridging contact so that it in combination with a remoiw able switch and, comprising a row of conso that each bridging contact will coerc the middle one and either nd one a; Fnwl roe of contacts and or mus ing the engaging ain't disengaging part of such incr ment to lie a substantial more." ment'of pure ranslation substantially at right angles to the line of such row of contacts and the intermediate part oi such motion to he partl r tational.

18, In a switch, the combination of three contacts, a bridging-g 01. act, said bridging contact being norn'ially out of engagement with all the contacts of said row and with its middle point suln-itaiitially equidistant from the two end contacts, means for moving said bridging contact first by a movement including one of rotation to a posi' tion where its middie point is .inbstantiaily equidistant from the inilldic contact of the row and one of the end contacts, and then by a movement of snbstantiall pure translation into engagement; With said middle and end contacts.

19. In a switch. the combination of ter minal contacts. a row of three inter mediate contacts cooperating therewith, a bridging contact. said bridging contact being normally out of engagement With all the contacts of said rev and with its middle point sul'istantially ernlitlistant from the two end contacts. and means for movin said bridging contact first to a posh tion W ere its middle point substantially equidistant from the middle contact oi the row and one of the end contacts, and then into engagement with said middle and end contacts.

20. In a switch, the combination of terminal contacts, a row of three intermediate contacts cooperating therewitl". a. bridging; contact normally out of engagement w' it the contacts of said row and with its middle point substantially equidistant rein. the end contacts thereof, a spring tending to hold said contact in such position, operating mechanism including guiding: surfaces for moving said bridging contact from such normal position to a position in which itbridges the middle contactof the row and one of the end contacts thereofthe la t part of such movement being one of sub stantially pure translation at right angles to said row of contacts.

21. In a switch, the combination of three contacts, a bridging contact the middle point of which is normally substantially equidistant from two of such contacts, an operating mechanism for moving said bridging contact so that its middle point is first made equidistant from one of said two contacts and the third contact and at a tilt fcrent distance from the other cl said two contacts and is then moved by a movement of substantially pure translation. into gag'ement with the tn 0 contacts fr m it has been nude equidistant.

a crutch t'or inciting: said (no toggies to said operating: shaft as Iliv i ter is turned in o ipor v directions E5;"=P ',l( from a normal position. and glories Witlsaid briil 'ing rowan-t will cause it to on i .e rtilrrwu' group of contarts accord on turnul in one direction or th 23. in a snitch, the cor a group of more than trvo ronhcts, a bride crating; ehatt. a

ti ton-nits connecting said md nitjl operating shaft, ting said two toggles to said operatic; shalt the latter turned in Uf);)t: -it18 tlirrrtions rt" tirei from a normal position, amt an i. int-rating with said lli'lti int: ontact and acting to came it to n il'ili'rrcnt pairs of said group contai ts accm'rlin j ::s the shattturned in one :1 i the other and to make the final pa t of such nar-emeni or the bridging; contact a moxement ol' substantiallv nure translation.

In a switch, the combination. of a group of more than two contacts. a bridge ing: contact, an operating shaft. a :ftii' of oppositely disposed t es connecting said bridging contact and. said rmerating s 'ia'i't, a utch for locking said two toggles to said operating shaft as the latter is turned in opposite directions cspectiveh; from a normal. posit-ion. and ides cooperating with, sairl brirhging ct and acti i, car-so it to em." e ili l'eri-nt. nails of said gwaap oi contar according: as the haft is turned in one direction or the other and to make the final part. of when incr ment of the bridging contact a niownieut ot' snhstair tially ,Lnue trans ation and the first 1 t It ll'lui'ttiitilt oi conihiinni l'fliliii 'n and tTltfllSlzt tion.

in a :ewi tlrr con within 1, fir-ail contacts, a lliuiithlO contact. an operating shalt. a pair of oppositely ali.--;p ;s(al t ggles loosely connected to said operating shat't anal to said movable contact. a spring tenrlin}; to hold the operating shaft and \nov able contact in normal position, a clutch which when the shaft is turned in opposite directi ns lot-its said two toggles respme tiz'ely to said ahait so that the motion from tire shait is ('(liliillllilli'kltttl to the movable conta n. and ides cooperating) with, said inoaabh- Cuiitnflfi for calming: it to cng fii difierent l ixeii touta when the operating in worm? in oppo ite ilirri-iions.

in a switch. the r ni nation of fixed iris. a mow le rontart :in operatii'ig shit, a pair ot oppwitely disposed toggles loosely conmzctcd to said operating shaft and to said movable Contact, a spring tending to hold the operating shaft and movable contact in normal position, a. clutch which when the shaft is turned in opposite directions locks said two toggles respectively to said shaft so that the motion from the shaft is communicated to the movable contact, and guides cooperating with said movable contact for causing it to engage (.litt'erent fixed contacts when the operating shaft is moved in opposite directions and for causing the linai engaging movement of said movable contact to be one of substantially pure translation 21 lo a switch, the combination of fixed contacts, a movable contact, an operating shaft, :1 pair of oppositely disposed. toggles loosely connected to said operating shaft and to said movable contact, a spring tend ing to hold the operating shaft and movable contact in normal position, a clutch which when the shaft is turned in opposite directions locks said two toggles respectively to said shaft so that the motion from theshaft is communicated to the movable contact, and guides cooperating With said movable contact for causing it to engage i dill'erent fixed contacts when the operating shaft is moved in opposite directions and for causing the final engaging movement of said movable contact to be one of substantially pure translation and the first part a movement of combined translation and rotation.

28. In a switch, the combination of terminal contacts, one or n'iore rows of interrne diate contacts cooperating therewith, there being three contacts in a row, a l ridging contact for each ro of said intermediate contacts, and means to; moi ing said bridging contacts so that each br dging contact may engage the middle contact and either mid contact of a correspc oi v row of intermediate contacts and for causing the owgaging and disengaging movement between said bridging contacts and intermediate contacts to be one of substantially pure translation.

In testimony whereof I allix my ture, in the presence of two Witnesses.

BRADLEY HASKINS.

signa- Witnesses G. B Sammy, CHAS. L. BYRON. 

